<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<script>
    // 递增和递减运算符：
    // ++
    //     -前置递增运算符：先⾃加1，后返回值
    let a = 1;
    res1 = ++a
    console.log(res1, a);
    //     -后置递增运算符：先返回原值，后⾃加1
    let b = 1;
    res2 = b++;
    console.log(res2, b);
    // --
    //     -前置递减运算符：先⾃减1，后返回值
    //     -后置递减运算符：先返回原值，后⾃减1


    let c = 10
    let d = "10"
    console.log(c == d)
    console.log(c === d)


    let e = true
    let f = false
    console.log(e && f)

</script>
</body>
</html>
